/Engine/Source/Runtime/InteractiveToolsFramework/Public/InteractiveTool.h
Call after changing a propertyset internally in the tool to allow external views of the property set to update properly. This is meant as an outward notification mechanism, not a way to to pass along notifications, so don't call this if the property is changed externally (i.e., this should not usually be called from OnPropertyModified unless the tool adds changes of its own).
virtual void NotifyOfPropertyChangeByTool ( [UInteractiveToolPropertySet](API\Runtime\InteractiveToolsFramework\UInteractiveToolPropertySet) * PropertySet ) const